led_status

From Mammoth Macaw, 6 Years ago, written in Bash, viewed 199 times.

URL https://paste.steamr.com/view/5414f884 Embed

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#!/bin/sh
 
test -c /dev/ttyS0 || exit
 
stty -F /dev/ttyS0 9600
 
Mac=`ifconfig | grep -Eiwoh '[a-z0-9:]{17}' | tr '\n' ';'`
 
Status=`wget -q -O - http://the.displays.cpsc.ucalgary.ca/presentation/begin/$Mac \
        | grep -Eoh "room_status[^\"]*" \
        | tail -n 1 \
        | awk '{print $2}'`
 
if [[ "$Status" == "available" ]] ; then
        # turn light green
        echo -e "\xFE\x00" > /dev/ttyS0
else
        # turn light red
        echo -e "\xFE\x01" > /dev/ttyS0
fi
 

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led_status

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